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  • Additional radial load-carrying capability compared to single-row product.
  • Designed to ISO/DIN specified interchangeable dimensions.
  • Sold as complete assembly.

NNU-1
  • Outer rings with solid ribs.
  • Lubrication grooves and holes on outer rings.
  • One solid brass cage.

The radial internal clearance (RIC) for the bearing assembly must be included when ordering the complete assembly.
Unit of Measure

Key Dimensions

Bore d

 N/A 240 mm

Static Load Rating Co

 N/A 1220000 N274000 lbf
Dynamic Load Rating C11 N/A 591000 N133000 lbf
Geometry Factor Cg2 N/A 0.1650

Thermal Speed Ratings - Oil

 N/A 1200 rpm

Thermal Speed Ratings - Grease

 N/A 1100 rpm

Bearing Dimensions

O.D. D

 N/A 320 mm12.5984 in

Width B

 N/A 80 mm3.1496 in

DUR/DOR F/E

 N/A 265 mm10.4331 in

Mounting Data

Chamfer rsmin

 N/A 2.1 mm0.08 in
Chamfer r1smin3 N/A 2.1 mm0.080 in

Backing Shaft Diameter ds

 N/A 260 mm10.2400 in

Backing Housing Diameter Ds

 N/A 299 mm11.7700 in

Lubrication Data

Lubrication Groove g

 N/A 12.3 mm0.48 in

Lubrication Hole Diameter h

 N/A 6.0 mm0.24 in

Number of Lubrication Holes

 N/A 6
Dimension S4 N/A 3.90 mm0.150 in
  • 1 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 2 Cg factor for bearing without inner ring.
  • 3 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 4 Permissible axial displacement from normal position of one bearing ring in relation to the other.
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